Roseovarius gaetbuli sp. nov., a novel alphaproteobacterium isolated from a tidal flat sediment
2014
Park, Sooyeon | Park, Ja-Min | Kang, Chul-Hyung | Yoon, Jung-Hoon
A Gram-negative, aerobic, non-motile and ovoid or rod-shaped bacterial strain, designated YM-20ᵀ, was isolated from a tidal flat of the Yellow Sea in South Korea. Strain YM-20ᵀwas found to grow optimally at 30 °C, at pH 7.0–8.0 and in the presence of 2.0–3.0 % (w/v) NaCl. Phylogenetic trees based on 16S rRNA gene sequences revealed that strain YM-20ᵀclustered consistently with the type strains of ‘Roseovarius marisflavi’ and Roseovarius lutimaris, with which it exhibited 16S rRNA gene sequence similarities of 99.86 and 98.71 %, respectively. Strain YM-20ᵀwas found to contain Q-10 as the predominant ubiquinone and C₁₈:₁ω7c as the predominant fatty acid. The major polar lipids of strain YM-20ᵀwere identified as phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, one unidentified aminolipid and one unidentified lipid. The DNA G+C content of strain YM-20ᵀwas determined to be 60.9 mol% and its DNA–DNA relatedness values with the type strains of ‘R. marisflavi’, R. lutimaris and Pelagicola litorisediminis were 53 ± 7.1, 22 ± 5.5 and 13 ± 4.7 %, respectively. The differential phenotypic properties, together with the phylogenetic and genetic distinctiveness, revealed that strain YM-20ᵀis separated from ‘R. marisflavi’, R. lutimaris, the other Roseovarius species and P. litorisediminis. On the basis of the data presented, strain YM-20ᵀis considered to represent a novel species of the genus Roseovarius, for which the name Roseovarius gaetbuli sp. nov. is proposed. The type strain is YM-20ᵀ(= KCTC 32428ᵀ = CECT 8370ᵀ).
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